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http://dx.doi.org/10.5012/jkcs.2011.55.1.014

Esterification of Methacrylic acid with Ethylene glycol over Heteropolyacid supported on ZSM-5  

Prabhakarn, A. (Department of Chemistry, Indian Institute of Technology Hyderabad)
Fereiro, J.A. (Department of Chemistry, Indian Institute of Technology Hyderabad)
Subrahmanyam, Ch. (Department of Chemistry, Indian Institute of Technology Hyderabad)
Publication Information
Abstract
Esterification of methacrylic acid with ethylene glycol was carried out over Heteropolyacids [HPA: $H_4SiW_{12}O_{40}$ (STA) and $H_3PW_{12}O_{40}$ (PTA)] supported on ZSM-5. For comparison, the same reaction was carried out over unsupported HPA, $H_2SO_4$, $BF_3$ and PTSA. Among the catalysts studied, HPA showed better activity compared to $H_2SO_4$, $BF_3$ and PTSA. Catalytic activity was compared with HPA supported ZSM-5 catalysts. Typical results indicated that 30 wt% PTA supported on ZSM-5 showed nearly the same activity as that of bulk PTA. It was found that the reaction follows first order kinetics with respect to methacrylic acid. The reaction products were identified by $^1H$-NMR and FT-IR.
Keywords
Esterification; Solid acid catalysts; Methacrylate; Heteropolyacid; Zeolites;
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